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I am new to ITIL and currently researching configuration management best practices, and have a few questions:<br />
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1) I am aware you should establish &quot;relationships&quot; between CI's to assist in reviewing change control impacts, dependancies, and resolving incidents etc, I was just wondering if any IT departments who follow ITIL and a formal configuration management policy, can you provide a few examples of &quot;relationships&quot; you have defined in your CMDB between the various elements that make up your VMware infrastructure?<br />
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2) Common sense suggests it is crucial to ensure all your servers/infrastructure are logged as CI's in your CMDB, as otherwise you cannot tie changes/incidents/relation<wbr />ships to them - but is there any risk in keeping old decommissioned CI's in your CMDB - i.e. say for example an old decomissioned file server which is still showing as deployed in your CMDB - are there any risks in this?
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I am new to ITIL and currently researching configuration management best practices, and have a few questions:

1) I am aware you should establish "relationships" between CI's to assist in reviewing change control impacts, dependancies, and resolving incidents etc, I was just wondering if any IT departments who follow ITIL and a formal configuration management policy, can you provide a few examples of "relationships" you have defined in your CMDB between the various elements that make up your VMware infrastructure?

2) Common sense suggests it is crucial to ensure all your servers/infrastructure are logged as CI's in your CMDB, as otherwise you cannot tie changes/incidents/relationships to them - but is there any risk in keeping old decommissioned CI's in your CMDB - i.e. say for example an old decomissioned file server which is still showing as deployed in your CMDB - are there any risks in this?

VMWare Configuration Management

VMware, a software company founded in 1998,  was one of the first commercially successful companies to offer x86 virtualization. The storage company EMC purchased VMware in 1994. Dell Technologies acquired EMC in 2016. VMware’s parent company is now Dell Technologies.

VMware has many software products that run on desktops, Microsoft Windows, Linux, and macOS, which allows the virtualizing of the x86 architecture.  Its enterprise software hypervisor for servers, VMware vSphere Hypervisor (ESXi), is a bare-metal hypervisor that runs directly on the server hardware and does not require an additional underlying operating system.

VMware

Virtualization is the act of creating a virtual (rather than actual) version of something, including (but not limited to) a virtual computer hardware platform, operating system (OS), storage device, or computer network resources. Virtualization is usually the creation of a system that executes separate from the underlying hardware resources, or the creation of an entire desktop for systems located elsewhere, similar to thin clients.